Antiskid device



H. ST. PIERRE.

ANTISKID DEVICE.

APPLICATION FILED sEPLu. m9.

2 SHEETS-SHEET I.

Patented Dec. 28, 1920.

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ANTI-SKID DEVICE. APPLICATION HLED SEPT-24, 1919.

Patented Dec. 28, 1920.

2 SHEETSSHEET 2.

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HENRY ST. PIERRE, OF WILLIAMBTOWN, VERMONT.

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Specification of Letters Patent.

Patented Dec. 28 1920.

Application ma September 24, 1919. Serial no. amass.

T 0 all whom it may concern Be it known that I, HENRY ST. PIERRE, a citizen of' the United States, residing at \Villiamstown, in the county of Orange and State of Vermont, have invented new and useful Im rovements in Antiskid Devices, of which t e following is a specification.

This invention relates to an anti-skid de' vice for automobile tires, and has for its primary object to provide a device in which the tread members are so associated that movement of the device on the tires will be absolutely prevented, and besides increase the gripping action between the device and the ground, created upon the tendency of the tires to skid.

An object of the invention is to provide means for quickly clamping the device in place u on the tires, and capable of taking Fig. 4 is an edge view of a portion of the a device.

Fi 5 is a cross section view of one of the mem ers. V

Fig. 6 is an enlarged side elevation of the clamp. U

Fig. 7 is a cross section view thereof.

Fig. 8 is a perspective view of the clip.

Again re erring to the drawings illustratin the preferred one of the many forms in which the invention ma be constructed a numeral 1 designates a p urality of tread members arcuate shape so as to conform to the tread of the tire. The intermediate portion of each member is provided with radiaily extending flan es 2 for engagement with the ground. Links 8 flexibly connect openings 4 in the members with chains By this arran ement as clearly shown in Fig. 2 of the rawings, the gripping effect between the members and the ground will be materially increased when the tire tends to skid, owing to the fact that the frictional engagement of the flanges with the ground will force the members in a direction to bring a greater portion of each member into engagement with the ground. It will also he noted that a portion of each chain 5 is forced out of its normal position which ma terially increases the pressure between the upper members and the tire thereby absolutely preventing slipping of the device on the tire.

A feature of my invention is the clamp 6 which enables me to quickly arrange the device in place and take up any slackness in the chain. This clampconsists of a ratchet element 7 pivotally connected to one end of the chain and the clip 8 pivotally connected to the other end of the chain. The clip 8 is provided with a guide way 9 for the reception of the element 7 and a slot 10 arranged so as to allow the free end 11 of the spring 12 to enter the slot 10 and engage an one of the teeth of the ratchet element. he spring has an intermediate portion 13 pivoted to a rivet 14 in the clip while its remainin end 15 is arranged in recess 16 in the chp, so that the clip may have the proper degree of resilency in its en agement with the teeth.

t is of course to be understood that the invention maybe constructed in various other manners and the parts associated in other relations, and therefore I-do not desire to be limited in an manner except as set forth in the claim hereunto appended.

What I claim is A chain fastener comprising a loop-like guide member carried by one end of a chain,

a ratchet member carried by the other end of the chain and slidable through said guide and formed with a; pluralityof notches, a U-shaped spring secured upon said guide and having its bight portion engpgeable within a selected one of said notc es and said guide having a slot for the reception of thebi ght portion of the spring.

In testimony whereof I afiix m si ature.

. HENRY ST. IE RE. 

